Abstract：
Based on ambient air quality data, meteorological observation data, and satellite remote sensing data, the temporal and spatial variations in ozone (O3) pollution, the sensitivity of O3, and its relationship with meteorological factors in Hainan Island were analyzed in this study. The results showed that the maximum daily 8-h moving mean (O3-8h) in western and northern cities in Hainan Island was higher than that in the central, eastern, and southern cities. O3-8h was the highest in 2015, and O3-8h exceeding the standard proportion was the largest in 2019. In addition, O3-8h was positively correlated with average temperature (P<0.1), sunshine duration (P<0.01), total solar radiation (P<0.01), atmospheric pressure, and average wind speed and was negatively correlated with precipitation (P<0.05) and relative humidity. The satellite remote sensing data showed that the tropospheric NO2 column concentration (NO2-OMI) and HCHO column concentration (HCHO-OMI) displayed opposite trends in Hainan Island from 2015 to 2020. Compared with those in 2015, NO2-OMI increased by 7.74% and HCHO-OMI decreased by 10.2% in 2020. Moreover, Hainan Island belongs to the NOx control area, and the FNR value exhibited a fluctuating downward trend in the past 6 years, with a trend coefficient and climatic trend rate of -0.514 and -0.123 a-1, respectively. A strong correlation was observed between meteorological factors and the FNR value of Hainan Island.
摘要：
根据环境空气质量数据，气象观测资料,和卫星遥感数据，臭氧（O3）污染的时空变化，分析了O3的敏感性及其与海南岛气象因子的关系。结果表明，海南岛西部和北部城市的最大日8-h移动平均值（O3-8h）高于中部，东方,和南方城市。2015年O3-8h最高，2019年O3-8h超标比例最大。此外,O3-8h与平均气温呈正相关(P<0.1),日照时数(P<0.01),太阳总辐射(P<0.01)，大气压力,平均风速与降水量(P<0.05)、相对湿度呈负相关。卫星遥感数据显示，2015-2020年海南岛对流层NO2柱浓度（NO2-OMI）和HCHO柱浓度（HCHO-OMI）呈现相反趋势。与2015年相比，2020年NO2-OMI增长了7.74%，HCHO-OMI下降了10.2%。此外，海南岛属于氮氧化物控制区，FNR值在过去6年呈现波动下降趋势，趋势系数和气候趋势率分别为-0.514和-0.123a-1。气象因子与海南岛的FNR值之间存在很强的相关性。
